Improvement in automatic stops for elevators



J. BEGGS.

Patented Aug. 28,1877.

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JAMES BEGGS, OF PATEBSON, NEW JERSEY.

IMPROVEMENT IN AUTOMATIIC'STOPS FOR ELEVATRS.

Specification forming part of Letters atent No. ll9d,5&6, dated August 28, 1877 g application filed August 1, 1877.

To all whom it may concern:

Be it known that I, JAMES Briefes, of Paterson, in the county of Passaic and State of New Jersey, have invented an Improvement in Automatic Stops for Elevators, of which the following is a specification:

In car and platform elevators it is usual to have a vertical stopping and starting handrope, and upon this there have been stops at the extreme upward and` downward movements, so that the car actuates the stopping mechanism at the extremes of its vertical movement In case of this hand-rope breaking there is nothing to stop the engine, and something is injured.

The object of this invention isto provide an automatic stop that will operate at both ends of the movement of the car or platform independent of the hand-rope, so that it may be relied on as a substitute for the stops upon the hand-rope, or act in addition thereto and come into play should the hand-rope break.

I make use of a gear-wheel and a disk upon the same shaft, with tumblers intervening, so that the disk remains quiescent during the hoisting operation, while the tumhlers are revolved in succession, and just before the car or platform reaches its extreme move- 'nent the tumblers stop, come into contact with each other, and form a connection from the gear-wheel to the disk, and the latter is partially revolved, and the stopping and Starting lover moved by a link from the said isk. 4

When the movement of the'engine is reversed the tumblers are rotated one after and by the other until all the stops come into contact with each other and cause the wheel to move the disk, link, and lever in the opposite direction, and again stop the engine.

In the drawing, Figure 1 is an elevation of the hoisting apparatus with part ot the disk removed', and Fig. 2 is asectional plan of the gear-wheel, disk, and tumblers in larger size.

The wheel a upon the shaft i may be one of the band or gear wheels of the hoisting apparatus. It is, however, shown as a special wheel, revolved by the pinion c; but it may the an arm carrying the stop d, that projects at one side to take the stop c upon the tumoler f, and this stop e also comes into contact with the stop la of the tumbler g, and so on.

versing lever n of the hoisting apparatus.

The stop d is revolved around the shaft z' whenever the engine is moving, and according to the proportion of the gearing 'and the movementof the car or platform, so the stop d will make two or more revolutions during the hoisting or lowering of thc car or platform, and according to the number ot' revolutions, so two or more tumblers will be required.

Starting with the stops all against each other, as seen in Fig. l, suppose the wheel or arm, with the stop d, to he revolved in the direction of the arrow, away from the other stops, then they remain stationary until the stop d has made nearly a revolution, then it comes around against the next stop e or tumbier, and carries that with it, and the two make nearly another revolution and come against the stop la, and moves that, and so on, and when the car or plat-form is near its extreme movement the stop t ou the disk Z is acted upon, the disk partially revolved, and the link m and lever n moved so as to stop the engine. The reversal of the engine causes the same parts to be moved successively in a similar manner, and finally to stop the engine when the car or platform arrives at the extreme point of movement in the opposite direction.

This apparatus is not subject to the objections that would arise if a train of gearing to reduce the speed was employed, because in my apparatus t-lie action upon the stopping-lever is nearly as rapidly as by hand.

I claim as my invention- The combination, with the elevating mechanism, of a range of tumblers with stops, the actuating-wheel and connections to the stopping-lever of the engine, substantially as set forth.

Signed by me this 20th day of July, A. D. 1877.

JAMES BEGGS. 

